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The 2014 Jaguar XFR-S might have only been good enough to take the runner-up spot in our Editor's Choice top five debuts at the LA Auto Show, but we'd be hard-pressed to find a car with a more exhilarating exhaust note. As proof of this, Jaguar released a video showing the XFR-S tearing up a windy, European mountain road in close to a minute of hardcore driving footage.

If there's something wrong about a sedan with a 550-horsepower supercharged V8, we don't want to hear about it. Instead, we want to marvel at the car in person, which is fortuitous because Jaguar has officially unveiled the 2014 XFR-S at the 2012 LA Auto Show. That blown 5.0-liter V8 dishes up a full 502 pound-feet of torque, which is good enough to shuttle the four-door to 60 mph in a scant 4.4 seconds. And, thanks to a start stop system and a few other fuel-saving tricks, the 2014 XFR-S gets a